ECX-3TAX MICRO MINIATURE SMD TUNING FORK CRYSTAL The ECX-3TAX is a 2.0 mm low profile ruggedized thermoplastic molded 32.768KHz SMD tuning fork crystal. This crystal is excellent for SMD applications with limited circuit board space requirements. FEATURES • Low profile 2.0 mm maximum height • Industry standard footprint • Long term stability • Excellent shock resistance • Excellent environmental characteristics • Tape & Reel (3,000 pcs) • RoHS Compliant w/exemption for Pb in High Temp Solder Discontinued PART NUMBERING GUIDE “EXAMPLE” MANUFACTURER ECS FREQUENCY .327 – – LOAD CAPACITANCE 12.5 PACKAGE TYPE 24X – OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PARAMETERS NOMINAL FREQUENCY LOAD CAPACITANCE DRIVE LEVEL CALIBRATION TOLERANCE EQUIVALENT SERIES RESISTANCE TEMPERATURE COEFFICIENT OPERATING TEMPERATURE RANGE MAX. OPERATING TEMPERATURE RANGE Q FACTOR TURNOVER TEMPERATURE STORAGE TEMPERATURE RANGE INSULATION RESISTANCE SHUNT CAPACITANCE MOTIONAL CAPACITANCE AGING (FIRST YEAR) ECX-3TA 32.768 12.5 Standard (6.0 Optional) 1.0 max. ±20 50 max. -0.040 PPM /˚C2 max. -10 ~ +60 -40 ~ +85 50,000 min. +25 ± 5 -55 ~ +125 500MΩ min./ DC 100V 2.0 typical 0.003 pF typical ±3 PPM max. @ +25˚C Fo CL DL @ +25˚C R1 TOPR Q TO TSTG IR Co C1 Δf/fo UNITS KHz pF µW PPM KΩ PPM/(ΔC˚) ˚C ˚C ˚C ˚C MΩ pF pF PPM PACKAGE DIMENSIONS (mm) #4 RECOMMENDED OSCILLATION CIRCUIT 2.5 2.0 #3 Rf PARABOLIC TEMPERATURE CURVE T (˚C) -20 -10 0 10 20 30 40 50 60 70 -10 #1 #2 Rd 7.3 max. -20 5.08 2.0 max. 0.4 C1 ELECTRICAL CHARACTERISTICS IC: TC 4069P Rf: 10MΩ Rd: 330KΩ (As required) C 1 = 22pF, C 2 = 22pF V DD = 3.0V 1.2 3.88 1.2 1.3 2.4 1.3 #3 #1 -40 -60 Figure 1) ECX-3TA – Top, Side and End views #4 C2 -50 0.2 min. 1.8 -30 In this circuit, low drive level with a maximum of 1µW is recommended. If excessive drive is applied, irregular oscillation or quartz element fractures may occur. f/f (PPM) To determine frequency stability, use parabolic curvature. For example: What is the stability at 45˚C? 1) Change in T (˚C) = 45 -25 = 20˚C 2) Change in frequency = -0.04 PPM x (ΔT) 2 = -0.04 PPM x (20) 2 = -16.0 PPM #2 Figure 2) ECX-3TA – Land Pattern - Top view ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM SMD CRYSTALS 13 SMD CRYSTALS